Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeeefc0dfbf5db1d…

MALICIOUS

PDF

80.8 KB Created: 2021-03-23 01:41:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 23daf2662e3ff9ed196e1f8989c544d6 SHA-1: e78a623e9e7d3fa8a4b9ddb6438f754588fc7474 SHA-256: aeeefc0dfbf5db1d27147b66697da55bbd7a15f4316662e81a2c65f60fef703f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with a high concentration on disposable hosting, and one specific URL is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://kuzutuzo.ru/strik?utm_term=infinix+note+9+pro+price+in+nepal PDF link annotation
    • http://esportzmlevent.com/nature_d_un_motkjarf.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/cuantos_centimetros_son_una_pulgada_y_un_cuarto.pdfIn PDF document text
    • http://busforpay.online/gesofizereg4oc9c.pdfIn PDF document text
    • http://goshop32.site/finding_area_of_triangle_with_sines3vl9.pdfIn PDF document text
    • http://pl50off.info/571897066044eaeh.pdfIn PDF document text
    • http://rozogididibusar.sportsontheweb.net/wiwibix.pdfIn PDF document text
    • http://sy0n.icu/apple_user_interface_guidelines_buttons4v747.pdfIn PDF document text
    • http://zokoxakabu.medianewsonline.com/7870324097.pdfIn PDF document text
    • http://kleomaften.online/nexumemesibaletitbq49.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e5d5404-7060-41e2-a50d-5d2a6df9fa53/tp_link_av500_manual_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fda7a713-5736-467b-be52-98f04f1468f3/john_deere_l130_transmission_oil_change.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1888d7e-37bd-4ad0-a6c2-efe9bcbd39f1/how_to_use_bissell_proheat_2x_12_amp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7a255f3-28fa-4176-bf9b-4e9d2e2ff01c/zombie_blastoise_pixelmon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a987d0f7-926b-4318-9456-ea7498102a81/leo_new_moon_2020_time.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/nemudumavemo.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/89078450398.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d33bec5a-218c-407c-92b1-07a73f8b800c/60775258117.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/santa_muerte_rosary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edbf5586-fa62-4bf5-b5c3-45504eb4d162/prepositional_phrases_worksheets_8th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/muscle_groups_anatomy.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE94 4992 bytes
SHA-256: 01a7edceb8e1922fb4c8fb2520a10e006e1178b1ef3e926499d143e0df311450
font_01_sfnt_off00010fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAC 11340 bytes
SHA-256: c9a3fb4941080281375c519ca17784f8382f643d1992f0bd207862c94979b237

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